没有区别,都是引导让步状语从句.如：
However you work hard,the boss is just not satisfied with you.
=No matter hard you work,the boss is just not satisfied with you.
再问： 在句中呢
再答： 据我的印象，好像这两个词都不用于句中。 The workers lived a hard life in the old days, however/no matter how hard they worked.这个例子的让步状语从句是在句末。 无论用于何处，主句和从句之间都要用逗号隔开。
再问： the most surprising thing about it, however,is that it can land anywhere 书上的句子，该怎么改
再答： 这个however是“然而”的意思，不同于上面的however。这句可以改成： However, the most surprising thing about it is that it can land anywhere.
